UFO: Alien Invasion v2.2.1 Free Full Game for Linux

Bugfixes
Fixed aircraft interception bug: aircraft HP and aircraft armour have no impact on game.
Fixed a bug where a captured bloodspider was killed when the alien breathing apparatus was not researched first.
Fixed negative maximum storage capacity after loading a game if base has more than 4 storage.
Fixed aircraft stats according to wiki (stiletto is now different from saracen).
Fixed crash when aircraft returns to base without completing a mission.

Features
Removed civilian death limit. Instead you will lose if you make too many nations unhappy.
Added UFO Theory to Tech Tree
Item statistics are shown for unresearched ammo using researched weapons, or researched ammo using unresearched weapons (for example in case of all particle weapons).
Draw base and aircraft weapon range on geoscape when a UFO is visible
Improved in-game IRC client (personal messages, custom motd)
Updated financial system (lowered monthly income and weapon prices, increased aircraft prices)